"Ever wonder why a seemingly perfect body does not necessarily a strong attraction make? Proponents of evolutionary psychology believe that it's the face that may seal the attraction deal. Perfect facial symmetry, they say, equals sexual desirability. But why? From conception, the human body develops by neatly splitting cells in half if all goes well, a "perfect" human, with an equal right and left side, results. But since nature makes mistakes, and genetic mutations do occur, most of us have little physical quirks, like one ear that is bigger than the other. From an evolutionary standpoint, we're all looking to create strong, healthy offspring. So it makes sense that those who are more symmetrical and more likely to be desirable mates are also often the most sexually attractive! Interestingly, it's also the only measure of attraction that crosses all cultures!

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Expert:

If you're a wallflower, your uber flirty friend is probably healthier than you. How does flirting make a body feel great?

Transcript: Think you know everything about catching the eye of the opposite sex? Think again! Flirting is fun,...

Think you know everything about catching the eye of the opposite sex? Think again! Flirting is fun, but it's also good for you! Studies show that people who flirt on a regular basis have higher levels of white blood cells in their bodies. Since these cells work in the immune system to fight harmful invaders, frequent flirters are actually healthier than those who avoid coy glances. Flirting is also universal. Women across the globe engage in similar moves to entice men. What's the most common gesture? Smiling, arching the eyebrows, then averting the gaze and giggling. But flirting can-and does-go astray! Research shows that men often mistake friendly behavior as being sexually suggestive. And both genders are guilty of making the most common flirting mistake, according to body language experts: maintaining too much eye contact. But there's really little to fear when it comes to flirting...as we've seen, it does a body good!

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You may think you pick your partner based on what your eyes tell you, but it could actually be your nose that's doing the selecting!

Transcript: Get
a whiff of this: Your sense of smell may account for the majority of your
sexual response. We have...

Get
a whiff of this: Your sense of smell may account for the majority of your
sexual response. We have more than 1,000 olfactory genes in our DNA. Compare
that to just 300 genes for photoreceptors in the eyes, and it's little wonder
that scent can ignite desire...or disgust.The human body produces pheromones,
chemical signals that communicate reproductive quality to potential partners.
These molecules are technically "odorless," so reacting to them is a
subconscious act. Pheromones may help explain why you find that "sooo not your
type" specimen incredibly sexy! There is still some controversy as to just how
much of a role pheromones play in attraction, so if you're looking to surround
yourself with scents to stimulate, studies have shown that men react most
favorably to "home-baked" scents, like cinnamon buns and pumpkin pie.
Meanwhile, women are aroused by baby powder, banana bread, and cucumbers! Who knew
that attraction smelled so delicious?